WPF ICommand Implementation for ComboBoxItem

Question

How can I implement ICommand in WPF(4.5) ComboBoxItem? I tried CommandBinding but I getting error message "Command' property of type 'CommandBinding'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject"

Answer 1

1. Add Reference to System.Windows.Interactivity as shown below

2. Then in Windows.xaml add below line . This will add reference to XAML

   xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"   
   

and your XAML will be like as given below

And your Combobox XAML be like : -

<ComboBox Name="myComboBox" SelectedValuePath="Content">
        <i:Interaction.Triggers>
        <i:EventTrigger EventName="SelectionChanged">
            <i:InvokeCommandAction Command="{Binding YourCommandName}" 
             CommandParameter="{Binding ElementName=myComboBox, 
              Path=SelectedValue}"/>
        </i:EventTrigger>
     </i:Interaction.Triggers>
     <ComboBoxItem Content="ItemOne" />
     <ComboBoxItem Content="ItemTwo" />
     <ComboBoxItem Content="ItemThree" />
</ComboBox>